NCERT Class 8 Mathematics Solutions: Chapter 11 –Mensuration Exercise 11.2 Part 8

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Formula of Area for Prism Bases

Formula of Area for Prism Bases

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1. Diagram of the adjacent picture frame has outer dimensions and inner dimensions. Find the area of each section of the frame, if the width of each section is same.

Given Frame in Figure

Answer:

Two of given figures (I) and (II) are similar in dimensions.

And also figures (III) and (IV) are similar in dimensions.

Area of figure (I) = Area of trapezium

Also,

Area of figure (ii)

Now,

Area of figure (III) = Area of trapezium

Also,

Area of figure (iv)